VIBS Infosol Private Limited Network Security Engineer Interview Questions and Answers

IKEv2 is more secure and efficient than IKEv1 for IPsec VPN.

• IKEv2 supports more secure encryption algorithms and has better resistance to attacks.

• IKEv2 has faster negotiation and rekeying times, improving performance.

• IKEv2 allows for more flexibility in terms of authentication methods.

• IKEv1 is still widely used and supported, but IKEv2 is recommended for new deployments.

• Both IKEv1 and IKEv2 are used to establish a secu...read more

Upgrading OS in distributed mode requires careful planning and execution.

• Ensure compatibility of new OS with existing hardware and software

• Create a backup of all important data before starting the upgrade process

• Test the upgrade process in a non-production environment first

• Schedule the upgrade during a maintenance window to minimize disruption

• Monitor the upgrade process closely and have a rollback plan in case of issue

VLANs are established by configuring network switches to group devices into separate virtual networks.

• Access the switch's configuration interface

• Create VLANs and assign ports to each VLAN

• Configure VLAN trunks for inter-VLAN communication

• Implement VLAN tagging if necessary

• Test connectivity and ensure proper segregation

There are 7 OSI layers in the OSI model.

• There are 7 layers in the OSI (Open Systems Interconnection) model: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has specific functions and protocols that help in the communication process.

• For example, the Physical layer deals with the physical connection between devices, while the Application layer is responsible for user interfaces

Data link layer is responsible for transferring data between adjacent network nodes.

• Data link layer ensures error-free transmission of data over the physical layer.

• It divides data into frames for transmission.

• It also handles flow control and error detection/correction.

• Examples include Ethernet, Wi-Fi, and PPP protocols.

DHCP stands for Dynamic Host Configuration Protocol, which is a network management protocol used to assign IP addresses automatically to devices on a network.

• DHCP eliminates the need for manual IP address configuration on each device

• It allows devices to obtain IP addresses, subnet masks, default gateways, and DNS server addresses automatically

• DHCP servers lease IP addresses to devices for a specific period of time

• DHCP ...read more

The preferred location for a Network Security Engineer is typically in a secure office environment with access to necessary equipment and resources.

• Secure office environment with restricted access to unauthorized personnel

• Access to necessary equipment and resources such as servers, firewalls, and monitoring tools

• Proximity to the IT team for collaboration and communication

• Possibly located near the data center for quick

VLAN stands for Virtual Local Area Network. It is a logical grouping of network devices that share the same broadcast domain.

• VLANs are used to improve network performance, security, and management.

• They allow network administrators to segment a large network into smaller, more manageable subnetworks.

• Each VLAN has its own broadcast domain, which reduces network congestion and improves performance.

• VLANs can also be used t...read more

STP stands for Spanning Tree Protocol. It is used to prevent loops in a network and ensure redundancy.

• STP is a protocol used in network switches to prevent loops in a network.

• It ensures that there is only one active path between any two network devices.

• STP blocks redundant paths to prevent loops and ensures network redundancy.

• STP is important for network stability and preventing broadcast storms.

• Examples of STP variant...read more